Even if I granted the US gov as being all seeing, a major problem is that it requires local PD/prosecutors to get the feds involved.
I’m not actually on board with attacking this via phone system regulations, but It is fairly easy to make anonymous phone calls using the techniques I pointed out. To actually fix something like this, you’d need every phone number to be registered in person with a star card and to completely outlaw virtual numbers providers with stiff penalties. But even then, there’s the issue of international numbers and illegally spoofing a number. Those can’t be fixed without revamping the telcos which is really hard with the amount of ossified tech in place.
This probably won’t happen in my lifetime, but the two things that need to happen are reducing gun ownership and demilitarization of the police. Cops are way too trigger happy, actual consequences when cops murder or harm individuals would go a long way in stopping them from perceiving everyone as an enemy combatant. Pulling guns off the streets would reduce the justifications of busting down doors with a dozen cops ready to shoot anything that moves.